Hi Damien!
So I just switched to a new print lab. It is a local lab at a camera store. I went and picked up some prints from them today and decided I was way over do to re-calibrate.
So I went through your instructions. My on screen display options were warm, medium, cool and a custom option. The custom option gave me the closest match to 6500 K so I went with that. Well once I finished the process, I compared my prints and they were darker/duller then the screen. It wasn't I guess a drastic difference but enough that I noticed. So I continued to read on and noticed you said to go for a lower white luminance target. So I tried 90, still wasn't quite there matching the print, well I thought I would try 80. I measured 87 (as I couldn't go any lower my brightness was at 0) and I achieved 81. I still feel that my prints are darker/duller but I am unsure where to go from here.
My achieved white point was at 6663 K
Thanks,
Mary